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Hey there! Tawny from Moz's Help Team here. Unfortunately we do not use a static IP address or range of IP addresses, as we have designed our crawler to have a dynamic approach. This means we use thousands of dynamic IP addresses which will change each time we run a crawl. This approach gives us the best dynamic view of the web, but it can make us incompatible with some servers or hosting providers. The best option I'd be able to suggest would be to identify our crawler by User-agent: rogerbot I apologize for the inconvenience this causes! Sorry I couldn't help you further. ​ If you have more questions or need some clarification, feel free to drop us a line at help@moz.com.